Supported data handover in DcTracker/DataConnection/ApnContext (881cdfb7) · Commits · e / os / android_frameworks_opt_telephony

src/java/com/android/internal/telephony/dataconnection/ApnContext.java

+11 −12

Original line number	Diff line number	Diff line
		@@ -32,12 +32,13 @@ import com.android.internal.R;
		import com.android.internal.telephony.DctConstants;
		import com.android.internal.telephony.Phone;
		import com.android.internal.telephony.RetryManager;
		import com.android.internal.telephony.dataconnection.DcTracker.ReleaseNetworkType;
		import com.android.internal.telephony.dataconnection.DcTracker.RequestNetworkType;
		import com.android.internal.util.IndentingPrintWriter;

		import java.io.FileDescriptor;
		import java.io.PrintWriter;
		import java.util.ArrayList;
		import java.util.List;
		import java.util.concurrent.atomic.AtomicBoolean;
		import java.util.concurrent.atomic.AtomicInteger;

		@@ -412,19 +413,21 @@ public class ApnContext {
		}
		}

		public void requestNetwork(NetworkRequest networkRequest, LocalLog log) {
		public void requestNetwork(NetworkRequest networkRequest,
		@RequestNetworkType int type, LocalLog log) {
		synchronized (mRefCountLock) {
		if (mLocalLogs.contains(log) \|\| mNetworkRequests.contains(networkRequest)) {
		log.log("ApnContext.requestNetwork has duplicate add - " + mNetworkRequests.size());
		} else {
		mLocalLogs.add(log);
		mNetworkRequests.add(networkRequest);
		mDcTracker.enableApn(ApnSetting.getApnTypesBitmaskFromString(mApnType));
		mDcTracker.enableApn(ApnSetting.getApnTypesBitmaskFromString(mApnType), type);
		}
		}
		}

		public void releaseNetwork(NetworkRequest networkRequest, LocalLog log) {
		public void releaseNetwork(NetworkRequest networkRequest, @ReleaseNetworkType int type,
		LocalLog log) {
		synchronized (mRefCountLock) {
		if (mLocalLogs.contains(log) == false) {
		log.log("ApnContext.releaseNetwork can't find this log");
		@@ -438,19 +441,15 @@ public class ApnContext {
		mNetworkRequests.remove(networkRequest);
		log.log("ApnContext.releaseNetwork left with " + mNetworkRequests.size() +
		" requests.");
		if (mNetworkRequests.size() == 0) {
		mDcTracker.disableApn(ApnSetting.getApnTypesBitmaskFromString(mApnType));
		if (mNetworkRequests.size() == 0
		\|\| type == DcTracker.RELEASE_TYPE_DETACH
		\|\| type == DcTracker.RELEASE_TYPE_HANDOVER) {
		mDcTracker.disableApn(ApnSetting.getApnTypesBitmaskFromString(mApnType), type);
		}
		}
		}
		}

		public List<NetworkRequest> getNetworkRequests() {
		synchronized (mRefCountLock) {
		return new ArrayList<NetworkRequest>(mNetworkRequests);
		}
		}

		/**
		* @param excludeDun True if excluding requests that have DUN capability
		* @return True if the attached network requests contain restricted capability.

src/java/com/android/internal/telephony/dataconnection/DataConnection.java

+145 −49

Original line number	Diff line number	Diff line
		@@ -129,14 +129,16 @@ public class DataConnection extends StateMachine {
		int mRilRat;
		Message mOnCompletedMsg;
		final int mConnectionGeneration;
		final boolean mIsHandover;

		ConnectionParams(ApnContext apnContext, int profileId, int rilRadioTechnology,
		Message onCompletedMsg, int connectionGeneration) {
		Message onCompletedMsg, int connectionGeneration, boolean isHandover) {
		mApnContext = apnContext;
		mProfileId = profileId;
		mRilRat = rilRadioTechnology;
		mOnCompletedMsg = onCompletedMsg;
		mConnectionGeneration = connectionGeneration;
		mIsHandover = isHandover;
		}

		@Override
		@@ -144,7 +146,9 @@ public class DataConnection extends StateMachine {
		return "{mTag=" + mTag + " mApnContext=" + mApnContext
		+ " mProfileId=" + mProfileId
		+ " mRat=" + mRilRat
		+ " mOnCompletedMsg=" + msgToString(mOnCompletedMsg) + "}";
		+ " mOnCompletedMsg=" + msgToString(mOnCompletedMsg)
		+ " mIsHandover=" + mIsHandover
		+ "}";
		}
		}

		@@ -155,11 +159,14 @@ public class DataConnection extends StateMachine {
		int mTag;
		public ApnContext mApnContext;
		String mReason;
		final boolean mIsHandover;
		Message mOnCompletedMsg;

		DisconnectParams(ApnContext apnContext, String reason, Message onCompletedMsg) {
		DisconnectParams(ApnContext apnContext, String reason, boolean isHandover,
		Message onCompletedMsg) {
		mApnContext = apnContext;
		mReason = reason;
		mIsHandover = isHandover;
		mOnCompletedMsg = onCompletedMsg;
		}

		@@ -167,6 +174,7 @@ public class DataConnection extends StateMachine {
		public String toString() {
		return "{mTag=" + mTag + " mApnContext=" + mApnContext
		+ " mReason=" + mReason
		+ " mIsHandover=" + mIsHandover
		+ " mOnCompletedMsg=" + msgToString(mOnCompletedMsg) + "}";
		}
		}
		@@ -286,9 +294,12 @@ public class DataConnection extends StateMachine {
		DataServiceManager dataServiceManager,
		DcTesterFailBringUpAll failBringUpAll,
		DcController dcc) {
		String transportType = (dataServiceManager.getTransportType() == TransportType.WWAN)
		? "C" // Cellular
		: "I"; // IWLAN
		DataConnection dc = new DataConnection(phone,
		"DC-" + mInstanceNumber.incrementAndGet(), id, dct, dataServiceManager,
		failBringUpAll, dcc);
		"DC-" + transportType + "-" + mInstanceNumber.incrementAndGet(), id, dct,
		dataServiceManager, failBringUpAll, dcc);
		dc.start();
		if (DBG) dc.log("Made " + dc.getName());
		return dc;
		@@ -498,21 +509,35 @@ public class DataConnection extends StateMachine {
		setInitialState(mInactiveState);
		}

		/**
		* Get the DcTracker for handover. There are multiple DcTrackers for different transports (e.g.
		* WWAN, WLAN). For data handover, we need to handover the existing data connection from current
		* DcTracker to the DcTracker on another transport.
		*/
		private DcTracker getHandoverDcTracker() {
		int transportType = mDataServiceManager.getTransportType();
		// Get the DcTracker from the other transport.
		return mPhone.getDcTracker(transportType == TransportType.WWAN
		? TransportType.WLAN : TransportType.WWAN);
		}

		/**
		* Begin setting up a data connection, calls setupDataCall
		* and the ConnectionParams will be returned with the
		* EVENT_SETUP_DATA_CONNECTION_DONE
		*
		* @param cp is the connection parameters
		*
		* @return Fail cause if failed to setup data connection. {@link DataFailCause#NONE} if success.
		*/
		private void onConnect(ConnectionParams cp) {
		private @DataFailCause.FailCause int connect(ConnectionParams cp) {
		if (DBG) {
		log("onConnect: carrier='" + mApnSetting.getEntryName()
		log("connect: carrier='" + mApnSetting.getEntryName()
		+ "' APN='" + mApnSetting.getApnName()
		+ "' proxy='" + mApnSetting.getProxyAddressAsString()
		+ "' port='" + mApnSetting.getProxyPort() + "'");
		}
		if (cp.mApnContext != null) cp.mApnContext.requestLog("DataConnection.onConnect");
		if (cp.mApnContext != null) cp.mApnContext.requestLog("DataConnection.connect");

		// Check if we should fake an error.
		if (mDcTesterFailBringUpAll.getDcFailBringUp().mCounter > 0) {
		@@ -525,11 +550,11 @@ public class DataConnection extends StateMachine {
		AsyncResult.forMessage(msg, response, null);
		sendMessage(msg);
		if (DBG) {
		log("onConnect: FailBringUpAll=" + mDcTesterFailBringUpAll.getDcFailBringUp()
		log("connect: FailBringUpAll=" + mDcTesterFailBringUpAll.getDcFailBringUp()
		+ " send error response=" + response);
		}
		mDcTesterFailBringUpAll.getDcFailBringUp().mCounter -= 1;
		return;
		return DataFailCause.NONE;
		}

		mCreateTime = -1;
		@@ -553,11 +578,46 @@ public class DataConnection extends StateMachine {
		boolean allowRoaming = mPhone.getDataRoamingEnabled()
		\|\| (isModemRoaming && !mPhone.getServiceState().getDataRoaming());

		// Check if this data setup is a handover.
		LinkProperties linkProperties = null;
		int reason = DataService.REQUEST_REASON_NORMAL;
		if (cp.mIsHandover) {
		// If this is a data setup for handover, we need to pass the link properties
		// of the existing data connection to the modem.
		DcTracker dcTracker = getHandoverDcTracker();
		if (dcTracker == null \|\| cp.mApnContext == null) {
		loge("connect: Handover failed. dcTracker=" + dcTracker + ", apnContext="
		+ cp.mApnContext);
		return DataFailCause.HANDOVER_FAILED;
		}

		DataConnection dc = dcTracker.getDataConnectionByApnType(cp.mApnContext.getApnType());
		if (dc == null) {
		loge("connect: Can't find data connection for handover.");
		return DataFailCause.HANDOVER_FAILED;
		}

		linkProperties = dc.getLinkProperties();
		if (linkProperties == null) {
		loge("connect: Can't find link properties of handover data connection. dc="
		+ dc);
		return DataFailCause.HANDOVER_FAILED;
		}

		reason = DataService.REQUEST_REASON_HANDOVER;
		}

		mDataServiceManager.setupDataCall(
		ServiceState.rilRadioTechnologyToAccessNetworkType(cp.mRilRat), dp, isModemRoaming,
		allowRoaming, DataService.REQUEST_REASON_NORMAL, null, msg);
		ServiceState.rilRadioTechnologyToAccessNetworkType(cp.mRilRat),
		dp,
		isModemRoaming,
		allowRoaming,
		reason,
		linkProperties,
		msg);
		TelephonyMetrics.getInstance().writeSetupDataCall(mPhone.getPhoneId(), cp.mRilRat,
		dp.getProfileId(), dp.getApn(), dp.getProtocol());
		return DataFailCause.NONE;
		}

		public void onSubscriptionOverride(int overrideMask, int overrideValue) {
		@@ -581,6 +641,8 @@ public class DataConnection extends StateMachine {
		if (TextUtils.equals(dp.mReason, Phone.REASON_RADIO_TURNED_OFF)
		\|\| TextUtils.equals(dp.mReason, Phone.REASON_PDP_RESET)) {
		discReason = DataService.REQUEST_REASON_SHUTDOWN;
		} else if (dp.mIsHandover) {
		discReason = DataService.REQUEST_REASON_HANDOVER;
		}
		}

		@@ -599,7 +661,7 @@ public class DataConnection extends StateMachine {
		if (apnContext == alreadySent) continue;
		if (reason != null) apnContext.setReason(reason);
		Pair<ApnContext, Integer> pair = new Pair<>(apnContext, cp.mConnectionGeneration);
		Message msg = mDct.obtainMessage(event, pair);
		Message msg = mDct.obtainMessage(event, mCid, cp.mIsHandover ? 1 : 0, pair);
		AsyncResult.forMessage(msg);
		msg.sendToTarget();
		}
		@@ -624,6 +686,7 @@ public class DataConnection extends StateMachine {

		long timeStamp = System.currentTimeMillis();
		connectionCompletedMsg.arg1 = mCid;
		connectionCompletedMsg.arg2 = cp.mIsHandover ? 1 : 0;

		if (cause == DataFailCause.NONE) {
		mCreateTime = timeStamp;
		@@ -746,6 +809,7 @@ public class DataConnection extends StateMachine {
		ConnectionParams cp) {
		SetupResult result;

		log("onSetupConnectionCompleted: resultCode=" + resultCode + ", response=" + response);
		if (cp.mTag != mTag) {
		if (DBG) {
		log("onSetupConnectionCompleted stale cp.tag=" + cp.mTag + ", mtag=" + mTag);
		@@ -1512,8 +1576,6 @@ public class DataConnection extends StateMachine {

		@Override
		public boolean processMessage(Message msg) {
		boolean retVal;

		switch (msg.what) {
		case EVENT_RESET:
		case EVENT_REEVALUATE_RESTRICTED_STATE:
		@@ -1521,45 +1583,43 @@ public class DataConnection extends StateMachine {
		log("DcInactiveState: msg.what=" + getWhatToString(msg.what)
		+ ", ignore we're already done");
		}
		retVal = HANDLED;
		break;

		return HANDLED;
		case EVENT_CONNECT:
		if (DBG) log("DcInactiveState: mag.what=EVENT_CONNECT");
		ConnectionParams cp = (ConnectionParams) msg.obj;
		if (initConnection(cp)) {
		onConnect(mConnectionParams);
		transitionTo(mActivatingState);
		} else {
		if (DBG) {

		if (!initConnection(cp)) {
		log("DcInactiveState: msg.what=EVENT_CONNECT initConnection failed");
		}
		notifyConnectCompleted(cp, DataFailCause.UNACCEPTABLE_NETWORK_PARAMETER,
		false);
		transitionTo(mInactiveState);
		return HANDLED;
		}
		retVal = HANDLED;
		break;

		int cause = connect(cp);
		if (cause != DataFailCause.NONE) {
		log("DcInactiveState: msg.what=EVENT_CONNECT connect failed");
		notifyConnectCompleted(cp, cause, false);
		transitionTo(mInactiveState);
		return HANDLED;
		}

		transitionTo(mActivatingState);
		return HANDLED;
		case EVENT_DISCONNECT:
		if (DBG) log("DcInactiveState: msg.what=EVENT_DISCONNECT");
		notifyDisconnectCompleted((DisconnectParams)msg.obj, false);
		retVal = HANDLED;
		break;

		return HANDLED;
		case EVENT_DISCONNECT_ALL:
		if (DBG) log("DcInactiveState: msg.what=EVENT_DISCONNECT_ALL");
		notifyDisconnectCompleted((DisconnectParams)msg.obj, false);
		retVal = HANDLED;
		break;

		return HANDLED;
		default:
		if (VDBG) {
		log("DcInactiveState not handled msg.what=" + getWhatToString(msg.what));
		}
		retVal = NOT_HANDLED;
		break;
		return NOT_HANDLED;
		}
		return retVal;
		}
		}
		private DcInactiveState mInactiveState = new DcInactiveState();
		@@ -1728,9 +1788,30 @@ public class DataConnection extends StateMachine {
		log("mRestrictedNetworkOverride = " + mRestrictedNetworkOverride
		+ ", mUnmeteredUseOnly = " + mUnmeteredUseOnly);
		}

		if (mConnectionParams != null && mConnectionParams.mIsHandover) {
		// If this is a data setup for handover, we need to reuse the existing network agent
		// instead of creating a new one. This should be transparent to connectivity
		// service.
		DcTracker dcTracker = getHandoverDcTracker();
		DataConnection dc = dcTracker.getDataConnectionByApnType(
		mConnectionParams.mApnContext.getApnType());
		if (dc != null) {
		mNetworkAgent = dc.getNetworkAgent();
		if (mNetworkAgent != null) {
		mNetworkAgent.sendNetworkCapabilities(getNetworkCapabilities());
		mNetworkAgent.sendLinkProperties(mLinkProperties);
		} else {
		loge("Failed to get network agent from original data connection " + dc);
		}
		} else {
		loge("Cannot find the data connection for handover.");
		}
		} else {
		mNetworkAgent = new DcNetworkAgent(getHandler().getLooper(), mPhone.getContext(),
		"DcNetworkAgent", mNetworkInfo, getNetworkCapabilities(), mLinkProperties,
		50, misc);
		}
		if (mDataServiceManager.getTransportType() == TransportType.WWAN) {
		mPhone.mCi.registerForNattKeepaliveStatus(
		getHandler(), DataConnection.EVENT_KEEPALIVE_STATUS, null);
		@@ -1761,7 +1842,13 @@ public class DataConnection extends StateMachine {
		mPhone.mCi.unregisterForLceInfo(getHandler());
		}
		if (mNetworkAgent != null) {
		// We do not want to update the network info if this is a handover. For all other
		// cases we need to update connectivity service with the latest network info.
		//
		// For handover, the network agent is transferred to the other data connection.
		if (mDisconnectParams == null \|\| !mDisconnectParams.mIsHandover) {
		mNetworkAgent.sendNetworkInfo(mNetworkInfo);
		}
		mNetworkAgent = null;
		}
		}
		@@ -2183,7 +2270,8 @@ public class DataConnection extends StateMachine {
		new Pair<ApnContext, Integer>(apnContext, cp.mConnectionGeneration);
		log("DcNetworkAgent: [unwanted]: disconnect apnContext=" + apnContext);
		Message msg = mDct.obtainMessage(DctConstants.EVENT_DISCONNECT_DONE, pair);
		DisconnectParams dp = new DisconnectParams(apnContext, apnContext.getReason(), msg);
		DisconnectParams dp = new DisconnectParams(apnContext, apnContext.getReason(),
		false, msg);
		DataConnection.this.sendMessage(DataConnection.this.
		obtainMessage(EVENT_DISCONNECT, dp));
		}
		@@ -2365,30 +2453,33 @@ public class DataConnection extends StateMachine {
		* AsyncResult.result = FailCause and AsyncResult.exception = Exception().
		* @param connectionGeneration used to track a single connection request so disconnects can get
		* ignored if obsolete.
		* @param isHandover {@code true} if this request is for handover.
		*/
		public void bringUp(ApnContext apnContext, int profileId, int rilRadioTechnology,
		Message onCompletedMsg, int connectionGeneration) {
		Message onCompletedMsg, int connectionGeneration, boolean isHandover) {
		if (DBG) {
		log("bringUp: apnContext=" + apnContext + " onCompletedMsg=" + onCompletedMsg);
		}
		sendMessage(DataConnection.EVENT_CONNECT,
		new ConnectionParams(apnContext, profileId, rilRadioTechnology, onCompletedMsg,
		connectionGeneration));
		connectionGeneration, isHandover));
		}

		/**
		* Tear down the connection through the apn on the network.
		*
		* @param apnContext APN context
		* @param reason reason to tear down
		* @param onCompletedMsg is sent with its msg.obj as an AsyncResult object.
		* With AsyncResult.userObj set to the original msg.obj.
		*/
		public void tearDown(ApnContext apnContext, String reason, Message onCompletedMsg) {
		if (DBG) {
		log("tearDown: apnContext=" + apnContext
		+ " reason=" + reason + " onCompletedMsg=" + onCompletedMsg);
		log("tearDown: apnContext=" + apnContext + " reason=" + reason + " onCompletedMsg="
		+ onCompletedMsg);
		}
		sendMessage(DataConnection.EVENT_DISCONNECT,
		new DisconnectParams(apnContext, reason, onCompletedMsg));
		new DisconnectParams(apnContext, reason, false, onCompletedMsg));
		}

		// ******* "public" interface
		@@ -2405,13 +2496,14 @@ public class DataConnection extends StateMachine {
		* Tear down the connection through the apn on the network. Ignores reference count and
		* and always tears down.
		*
		* @param isHandover {@code true} if this is for handover
		* @param onCompletedMsg is sent with its msg.obj as an AsyncResult object.
		* With AsyncResult.userObj set to the original msg.obj.
		*/
		public void tearDownAll(String reason, Message onCompletedMsg) {
		public void tearDownAll(String reason, boolean isHandover, Message onCompletedMsg) {
		if (DBG) log("tearDownAll: reason=" + reason + " onCompletedMsg=" + onCompletedMsg);
		sendMessage(DataConnection.EVENT_DISCONNECT_ALL,
		new DisconnectParams(null, reason, onCompletedMsg));
		new DisconnectParams(null, reason, isHandover, onCompletedMsg));
		}

		/**
		@@ -2479,6 +2571,10 @@ public class DataConnection extends StateMachine {
		return new ArrayList<>(mApnContexts.keySet());
		}

		public DcNetworkAgent getNetworkAgent() {
		return mNetworkAgent;
		}

		/**
		* @return the string for msg.what as our info.
		*/

src/java/com/android/internal/telephony/dataconnection/DcTracker.java

+180 −100

File changed.

Preview size limit exceeded, changes collapsed.

src/java/com/android/internal/telephony/dataconnection/TelephonyNetworkFactory.java

+7 −3

Original line number	Diff line number	Diff line
		@@ -159,15 +159,19 @@ public class TelephonyNetworkFactory extends NetworkFactory {
		private void requestNetworkInternal(NetworkRequest networkRequest) {
		int transportType = getTransportTypeFromNetworkRequest(networkRequest);
		if (mPhone.getDcTracker(transportType) != null) {
		mPhone.getDcTracker(transportType).requestNetwork(networkRequest, mLocalLog);
		// TODO: Handover logic will be added later. For now always normal request.
		mPhone.getDcTracker(transportType).requestNetwork(networkRequest,
		DcTracker.REQUEST_TYPE_NORMAL, mLocalLog);
		}
		}

		private void releaseNetworkInternal(NetworkRequest networkRequest, boolean cleanUpOnRelease) {
		int transportType = getTransportTypeFromNetworkRequest(networkRequest);
		if (mPhone.getDcTracker(transportType) != null) {
		mPhone.getDcTracker(transportType).releaseNetwork(networkRequest, mLocalLog,
		cleanUpOnRelease);
		// TODO: Handover logic will be added later. For now always normal or detach request.
		mPhone.getDcTracker(transportType).releaseNetwork(networkRequest,
		cleanUpOnRelease ? DcTracker.RELEASE_TYPE_DETACH
		: DcTracker.RELEASE_TYPE_NORMAL, mLocalLog);
		}
		}

tests/telephonytests/src/com/android/internal/telephony/dataconnection/ApnContextTest.java

+85 −10

Original line number	Diff line number	Diff line
		@@ -21,9 +21,11 @@ import static junit.framework.Assert.assertFalse;
		import static junit.framework.Assert.assertTrue;

		import static org.mockito.Matchers.eq;
		import static org.mockito.Mockito.never;
		import static org.mockito.Mockito.times;
		import static org.mockito.Mockito.verify;

		import android.net.NetworkCapabilities;
		import android.net.NetworkConfig;
		import android.net.NetworkRequest;
		import android.telephony.data.ApnSetting;
		@@ -114,19 +116,92 @@ public class ApnContextTest extends TelephonyTest {

		@Test
		@SmallTest
		public void testNetworkRequest() throws Exception {
		public void testNetworkRequestNormal() throws Exception {
		LocalLog log = new LocalLog(3);
		NetworkRequest nr = new NetworkRequest.Builder().build();
		mApnContext.requestNetwork(nr, log);
		NetworkRequest nr1 = new NetworkRequest.Builder().build();
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);

		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT));
		mApnContext.requestNetwork(nr, log);
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT));
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		mApnContext.releaseNetwork(nr, log);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT));
		mApnContext.releaseNetwork(nr, log);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT));
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);
		// The same request should be ignore.
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		NetworkRequest nr2 = new NetworkRequest.Builder()
		.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
		.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
		.removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
		.build();
		LocalLog log2 = new LocalLog(3);

		mApnContext.requestNetwork(nr2, DcTracker.REQUEST_TYPE_NORMAL, log2);
		verify(mDcTracker, times(2)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		mApnContext.releaseNetwork(nr1, DcTracker.RELEASE_TYPE_NORMAL, log);
		verify(mDcTracker, never()).disableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.RELEASE_TYPE_NORMAL));

		mApnContext.releaseNetwork(nr2, DcTracker.RELEASE_TYPE_NORMAL, log2);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.RELEASE_TYPE_NORMAL));
		}

		@Test
		@SmallTest
		public void testNetworkRequestDetach() throws Exception {
		LocalLog log = new LocalLog(3);
		NetworkRequest nr1 = new NetworkRequest.Builder().build();
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);

		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_NORMAL, log);
		// The same request should be ignore.
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		NetworkRequest nr2 = new NetworkRequest.Builder()
		.addTransportType(NetworkCapabilities.TRANSPORT_CELLULAR)
		.addCapability(NetworkCapabilities.NET_CAPABILITY_INTERNET)
		.removeCapability(NetworkCapabilities.NET_CAPABILITY_NOT_RESTRICTED)
		.build();
		LocalLog log2 = new LocalLog(3);

		mApnContext.requestNetwork(nr2, DcTracker.REQUEST_TYPE_NORMAL, log2);
		verify(mDcTracker, times(2)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_NORMAL));

		mApnContext.releaseNetwork(nr1, DcTracker.RELEASE_TYPE_DETACH, log);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.RELEASE_TYPE_DETACH));

		mApnContext.releaseNetwork(nr2, DcTracker.RELEASE_TYPE_NORMAL, log2);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.RELEASE_TYPE_NORMAL));
		}

		@Test
		@SmallTest
		public void testNetworkRequestHandover() throws Exception {
		LocalLog log = new LocalLog(3);
		NetworkRequest nr1 = new NetworkRequest.Builder().build();
		mApnContext.requestNetwork(nr1, DcTracker.REQUEST_TYPE_HANDOVER, log);
		verify(mDcTracker, times(1)).enableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.REQUEST_TYPE_HANDOVER));

		mApnContext.releaseNetwork(nr1, DcTracker.RELEASE_TYPE_HANDOVER, log);
		verify(mDcTracker, times(1)).disableApn(eq(ApnSetting.TYPE_DEFAULT),
		eq(DcTracker.RELEASE_TYPE_HANDOVER));
		}

		@Test